BMI Calculator
Calculate your Body Mass Index and understand what it means for your health
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Health Recommendations
If you're underweight:
- Eat more frequently - 5-6 smaller meals daily
- Choose nutrient-rich foods
- Try smoothies and shakes instead of soda
- Include strength training to build muscle
- Consult with a doctor or dietitian
If you're overweight:
- Aim for gradual weight loss (1-2 lbs per week)
- Increase physical activity
- Focus on whole foods and reduce processed foods
- Watch portion sizes
- Stay hydrated and limit sugary drinks
About Body Mass Index (BMI)
Body Mass Index (BMI) is a person's weight in kilograms divided by the square of height in meters. BMI is an inexpensive and easy screening method for weight category—underweight, healthy weight, overweight, and obesity.
The formula for BMI is:
BMI = weight(kg) / height(m)²
For imperial measurements, the formula is:
BMI = [weight(lbs) / height(in)²] × 703
BMI does not measure body fat directly, but research has shown that BMI is moderately correlated with more direct measures of body fat. Furthermore, BMI appears to be as strongly correlated with various metabolic and disease outcomes as are these more direct measures of body fatness.
It's important to remember that BMI is a screening tool, not a diagnostic of body fatness or health. A healthcare provider should perform appropriate health assessments to evaluate an individual's health status and risks.
Factors such as age, sex, ethnicity, and muscle mass can influence the relationship between BMI and body fat. Also, BMI doesn't distinguish between excess fat, muscle, or bone mass, nor does it provide any indication of the distribution of fat among individuals.